What was found
FLOOR BEAM HAS CORROSION BETWEEN FR89-90 Y+10 MAJOR REPAIR AND LEVEL 2 CORROSION BLENDED CORROSION ON FLOOR BEAM BETWEEN FR89-90 Y+10 PER EMB 175 SRM 51-10-03. BLENDED AREA MEASURES L= 4.3" W=.7" H=.019" ORIGINAL MATERIAL THICKNESS IS .040" PER EMB 175 SRMI 53-23-10- 55A. MAXIMUM MATERIAL REMOVED IS .019", MATERIAL REMAINING IS .021" AND IS FOUND TO BE OUT OF LIMITS PER EMB 175 SRM 51-75-16. PART NEEDS REPLACEMENT PN# 170-65177-003 LOCATED, DRILLED AND DEBURRED NEW FLOOR BEAM (INTERCOSTAL) AT FR 89-90 Y +10 IAW E-175 SRM 51-40-02 TREATED HOLES ON FLOOR BEAM (INTERCOSTAL) IAW E-175 SRM 51-23-04 REMOVED AND REPLACED FLOOR BEAM AT FR 89-90 Y+10 IAW E-175 SRM 51-40-08.